Q: What is the sum of all factors of the number 20,016,555 excluding 20,016,555?

 A: 15,981,141

Why is 15,981,141 the sum of all factors of 20,016,555, excluding 20,016,555?

The factors of the number 20,016,555 are: 1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4463, 4485, 13389, 22315, 58019, 66945, 102649, 174057, 290095, 307947, 513245, 870285, 1334437, 1539735, 4003311, 6672185, 20016555.

If you add them up, you will get the total of 20,016,570. Now subtract 20,016,555 to get 15,981,141


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